                       !   " ,   #$!   % &’    "’   Department of Physics, Jadavpur University, Jadavpur, Kolkata700 032, India  Department of Physics, Behala College, Kolkata700 060, India           ( Crystallographic data and refinement parameters of complex ( Crystal data Formula C 7 H 9 CoNO 7 Formula Weight 278.08 Crystal System Orthorhombic Space group P2 1 2 1 2 1 (No. 19) a [Å] 9.3953(1) b [Å] 7.3422(1) c [Å] 13.9495(2) V [Å 3 ] 962.27(2) Z 4 D(calc) [g/cm 3 ] 1.919 ;(MoKα)[mm] 1.805 F(000) 564 Crystal Size [mm] 0.15 x 0.17 x 0.20 Temperature (K) 295 Radiation [Å] MoKα 0.71073 Θ MinMax [°] 2.6, 25.3 Dataset 11: 11 ; 8: 8 ; 16: 16 Total 7279 Unique Data 1753 R(int) 0.034 Observed[I > 2.0 σ(I)] 1694 Nref 1753 Npar 145 R 0.0281 wR2 0.0746 S 1.11 Max. and Av. σ/esd 0.00, 0.00 Min. and Max. ∆ρ [e/Å 3 ] 0.46, 0.41 w = 1/[\s^2^(Fo^2^)+(0.0410P)^2^+0.5333P] where P=(Fo^2^+2Fc^2^)/3